For fun, I'm trying to make a PCB for this solid-state application but as you can suppose there is few sharpness to catch.

For example, when I want to parallel transistors, I can do it correctly for 2 of the 3 pins of them.
Common base and emittor are easy
If I want to keep project simple by using only single sided board, to my mind and at this time, I can't . Well for transistors and PCB gurus all around the board, things like could seems trivial so I'm proud to make them laughing.